package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;


    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信服务器器接口，获得OpenId，来标识每个人
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openId是否获得,是否为空,空就是登录失败，抛出业务异常
        if(openid==null||openid.equals("")){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user =userMapper.getByOpenid(openid);
        //新用户，自动注册
        if(user==null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }

    //这个方法调用微信接口服务，获取openid
    private String getOpenid(String code){
        //调用微信服务器器接口，获得OpenId，来标识每个人
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json =HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject =JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
